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[IA64] include EFI memory information in /proc/iomem 

User mode kexec tools expect to find information about physical
memory in /proc/iomem (as they do on x86) to validate the addresses
that the new kernel will use.

Signed-off-by: Khalid Aziz <khalid.aziz@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Khalid Aziz 2005-09-19 15:42:36 -07:00 committed by Tony Luck
parent d8c97d5f3a
commit be379124c0
2 changed files with 116 additions and 0 deletions
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87
arch/ia64/kernel/efi.c
View File

@ -923,3 +923,90 @@ efi_memmap_init(unsigned long *s, unsigned long *e)
*s = (u64)kern_memmap; *s = (u64)kern_memmap;
*e = (u64)++k; *e = (u64)++k;
} }
void
efi_initialize_iomem_resources(struct resource *code_resource,
struct resource *data_resource)
{
struct resource *res;
void *efi_map_start, *efi_map_end, *p;
efi_memory_desc_t *md;
u64 efi_desc_size;
char *name;
unsigned long flags;
efi_map_start = __va(ia64_boot_param->efi_memmap);
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
efi_desc_size = ia64_boot_param->efi_memdesc_size;
res = NULL;
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
md = p;
if (md->num_pages == 0) /* should not happen */
continue;
flags = IORESOURCE_MEM;
switch (md->type) {
case EFI_MEMORY_MAPPED_IO:
case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
continue;
case EFI_LOADER_CODE:
case EFI_LOADER_DATA:
case EFI_BOOT_SERVICES_DATA:
case EFI_BOOT_SERVICES_CODE:
case EFI_CONVENTIONAL_MEMORY:
if (md->attribute & EFI_MEMORY_WP) {
name = "System ROM";
flags |= IORESOURCE_READONLY;
} else {
name = "System RAM";
}
break;
case EFI_ACPI_MEMORY_NVS:
name = "ACPI Non-volatile Storage";
flags |= IORESOURCE_BUSY;
break;
case EFI_UNUSABLE_MEMORY:
name = "reserved";
flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED;
break;
case EFI_RESERVED_TYPE:
case EFI_RUNTIME_SERVICES_CODE:
case EFI_RUNTIME_SERVICES_DATA:
case EFI_ACPI_RECLAIM_MEMORY:
default:
name = "reserved";
flags |= IORESOURCE_BUSY;
break;
}
if ((res = kcalloc(1, sizeof(struct resource), GFP_KERNEL)) == NULL) {
printk(KERN_ERR "failed to alocate resource for iomem\n");
return;
}
res->name = name;
res->start = md->phys_addr;
res->end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1;
res->flags = flags;
if (insert_resource(&iomem_resource, res) < 0)
kfree(res);
else {
/*
* We don't know which region contains
* kernel data so we try it repeatedly and
* let the resource manager test it.
*/
insert_resource(res, code_resource);
insert_resource(res, data_resource);
}
}
}

29
arch/ia64/kernel/setup.c
View File

@ -78,6 +78,19 @@ struct screen_info screen_info;
unsigned long vga_console_iobase; unsigned long vga_console_iobase;
unsigned long vga_console_membase; unsigned long vga_console_membase;
static struct resource data_resource = {
.name = "Kernel data",
.flags = IORESOURCE_BUSY | IORESOURCE_MEM
};
static struct resource code_resource = {
.name = "Kernel code",
.flags = IORESOURCE_BUSY | IORESOURCE_MEM
};
extern void efi_initialize_iomem_resources(struct resource *,
struct resource *);
extern char _text[], _edata[], _etext[];
unsigned long ia64_max_cacheline_size; unsigned long ia64_max_cacheline_size;
unsigned long ia64_iobase; /* virtual address for I/O accesses */ unsigned long ia64_iobase; /* virtual address for I/O accesses */
EXPORT_SYMBOL(ia64_iobase); EXPORT_SYMBOL(ia64_iobase);
@ -171,6 +184,22 @@ sort_regions (struct rsvd_region *rsvd_region, int max)
} }
} }
/*
* Request address space for all standard resources
*/
static int __init register_memory(void)
{
code_resource.start = ia64_tpa(_text);
code_resource.end = ia64_tpa(_etext) - 1;
data_resource.start = ia64_tpa(_etext);
data_resource.end = ia64_tpa(_edata) - 1;
efi_initialize_iomem_resources(&code_resource, &data_resource);
return 0;
}
__initcall(register_memory);
/** /**
* reserve_memory - setup reserved memory areas * reserve_memory - setup reserved memory areas
* *